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Hello Jenkins Builder,

I'd like you to reexamine a change. Please visit

https://gerrit.osmocom.org/c/osmo-msc/+/41698?usp=email

to look at the new patch set (#2).

The following approvals got outdated and were removed: Verified-1 by Jenkins Builder

Change subject: add vty setting for ThemWi RTP formats ......................................................................

add vty setting for ThemWi RTP formats

For every GSM speech codec and for CSD, Osmocom BSS supports both the standard RTP format prescribed by 3GPP and an alternative enhanced RTP format invented by Themyscira Wireless: TW-TS-001, TW-TS-002, TW-TS-006 and TW-TS-007. In order to enable these enhanced RTP formats, the MSC needs to include an extension IE in the Assignment Request it sends to the BSS. Until now there was no way to do so in mainline OsmoMSC, only via local code patches - fix this omission.

The following considerations apply to this new tw-rtp-formats vty setting:

* When internal MNCC is used, it is beneficial to enable enhanced TW RTP formats, especially when using E1 BTS with tw-e1abis-mgw: the DL call leg receives more complete information content from the UL call leg in each direction.

* When external MNCC is used with non-ThemWi CN software (e.g., with a PBX via osmo-sip-connector), tw-rtp-formats should NOT be enabled - off-the-shelf PBX etc software won't understand them.

* Future patches will allow osmo-msc to operate with a ThemWi transcoding MGW (TC to G.711) in the place of non-TC osmo-mgw; in that configuration TW RTP formats will become mandatory, as they are strictly required by ThemWi TC implementation.

Change-Id: Icea152f5f2cdbcb0df09ef5b7211d1461b499f14 --- M include/osmocom/msc/gsm_data.h M include/osmocom/msc/ran_msg.h M src/libmsc/msc_a.c M src/libmsc/msc_vty.c M src/libmsc/ran_msg_a.c M tests/test_nodes.vty 6 files changed, 117 insertions(+), 0 deletions(-)

git pull ssh://gerrit.osmocom.org:29418/osmo-msc refs/changes/98/41698/2